Gate for locks, weirs, and the like.



c. BONZANIGO.

GATE FOR LOCKS, WEIRS, AND THE LIKE.

APPLICATION FILED NOV. 29. 1913.

2 SHEETS-SHEET l.

THE NORRIS PETERS CO.. PHOTO-LITHO. WASHING TON By C.

Patented Apr. 20, 1915.

C. BONZANIGO.

GATE FOB LOCKS, WEIRS, AND THE LIKE. APPLICATION FILED NOV. 29. was.

1,136,765, Patented Apr. 20, 1915.

2 SHEETS-SHEET 2.

THE NORRIS PETERS 60.. PHOTO-LITHOH Qkkulum-mu n n STATES PATENT OF 55 GE.

CARLO BONZANIGO, OF BASEL, SWITZERLAND.

GATE FOR LOOKS, WEIR/S, AND THE LIKE.

Application filed November 29, 1913.

To all whom it may concern:

Be it known that I, CARLO BONZANIGO, a citizen of Switzerland, residing at Basel, Switzerland, have invented certain new and useful Improvements in Gates for Locks, Weirs, and the like, of which the followmg is a specification.

My invention relates to improvements 1n gates for locks, weirs and the like, and more particularly in look or weir gateswhich are made in sections adapted to be lifted by a single hoisting mechanism.

The object of the improvements is to provide a lock gate of this class and its hoisting mechanism, in which when opemngthe gate the upper section is first moved into opening position and thereafter the lower section.

With this object in view my inventlon consists in the matters to be described hereinafter and particularly pointed out in the appended claims.

For the purpose of explaining the 1nvention two examples embodying the same have been shown in the accompanying drawings, in which the same letters of reference have been used in all the views to indicate corresponding parts.

In said drawings Figures 1 to 3, are vertical cross-sections of the gate showing the sections thereof in different positions, Fig. 1 showing both sections in closed position, Fig. 2 showing the upper section in open and the lower section in closed position, and Fig. 3 showing both sections in open position. Fig. 4, is a plan View showing the hoisting mechanism, Figs. 5 to 7 are crosssections of a modification of the gate similar to those shown in Figs. 1 to 3, and Fig. 8, is a plan view of the hoisting mechanism of the gate shown in Figs. 5 to 7.

Referring to the example illustrated in Figs. 1 to 4, my improved lock or weir gate consists of a lower section 6 and an upper section a which are movable independently of each other. As shown, the sections are connected to the opposite ends of flexible tension elements such for example as chains 7), d trained over suitable driving pulleys such as sprocket wheels 0 adapted tov be operated by a suitable hoisting mechanism such as gear wheels 0 meshing with pinions p mounted on a shaft 8 and adapted to be rotated from a suitable motor 1 through the intermediary of a worm gearing When both sections of the gate are in the Specification of Letters Patent.

Patented Apr. 20, 1915.

Serial No. 803,677.

closed position shown in Fig. 1, the part Z) of the chain from which the upper section is suspended is stretched, while the part 03 which is attached to the lower section is slack. If it is desired to open the gate, the sprocket wheels 0 are rotated by their driving mechanism so as to lower the upper section a, while for the present the lower section 6 remains at rest. The degree of the slackness of the part d of the chain is such, that the said part is stretched when the section a is in its lowermost position shown in Fig. 2. In thisposition of the gate sections the upper section a finds a support on arms if provided on the lower section. Therefore, when the hoisting mechanism is further operated in the same direction as before, the lower section which is thereby elevated carries along the upper section a until both arrive in the position shown in Fig. 3, in which the lock is perfectly open. When closing the gate the hoisting mechanism is operated in the opposite direction. At first both sections of the gate are lowered into the position shown in Fig. 2, whereupon by further operating the hoisting mechanism the upper section is lifted into the position shown in Fig. 1, while the lower section 6 remains at rest.

In the example shown in Figs. 5 to 8 the upper section 7 of the gate is hinged to the lower one 9. Chains h are connected to the upper ends of brackets 7 secured to the upper section 7, and chains 70 are attached to the lower section 9. To show that it is not necessary to connect the sections of the gate to the opposite ends of the same chain trained over the same sprocket wheel, as has been described with reference to Figs. 1 to 4, 'Figs. 5 to 8 show the said sections as being connected to separate chains each of which is trained on a sprocket wheel 2', Z respectively of its own and is attached with its free end to a fixed part a. The driving mechanism connected with the said sprocket wheels may be the same as in the example shown in Figs. 1 to 4. The overhanging ends m and j of the chains may be kept in suitable boxes (not shown).

The operation of the gate shown in Figs. 5 to 8 is the same as that of the gate shown in Figs. 1 to 4, and it will readily be understood from the figures showing the sections in their different positions. From the description it will be understood that a single hoisting mechanism is provided in combination with both sections of the gate. Therefore, if it is desired to open the gate in part only, as is ordinarily necessary in the operation of the gate, the upper section can be opened to the desired extent. For opening both sections the same hoisting mechanism is used which is operated in the same direction as before. If the size of the upper section is suliicient, the lower section is opened only in exceptional cases. hen operating the gate, theupper section is always opened prior to the lower one. Therefore the large amount of water is discharged through the upper section of the gate, so that the high pressure of the water is removed before the lower section is opened, so that the floorof the lock or the like is saved from injury caused by the high pressure of the water flowing over the same, and on the other hand floating bodies such as leaves, wood blocks, pieces of ice, and the like are removed together with the excess of water.

While in describing the invention reference has been made to particular examples embodying the same, I wish it to be understood, that my invention is notv limited to the general arrangement and construction of the parts shown in the drawings, and that various changes may be made within the scope of my invention. For example, in-

stead of the chain and sprocket mechanism provided for lifting the gate other suitable means may be provided.

I claim herein as my invention:

1. In a gate for looks weirs and the like, the combination with upper and lower gate sections, of a single hoisting mechanism connected with said sections'for operating the same in opposite directions, and means on said lower section operative after the upper section has been lowered into opening position and arranged to carry the upper section along as the lower section is raised to the fully open position of the gate.

2. In a gate for locks weirs and the like, the combination with upper and lower gate sections, of a single hoisting mechanism comprising rotary members, lifting elements connected with said rotary members for operation in opposite directions and connected respectively with the said gate sections, the element connected with the lower section being operative after the uppersection has been lowered into opening position, and means on said lower section for carrying the upper section along.

3. In a gate for looks weirs and the like, the combination with upper and lower gate sections, of a single hoisting mechanism comprising rotary members,'fiexible lifting elements connected with said rotary members for operation in opposite directions and connected respectively with the said gate sections, the element connected with the lower section being operative after the upper section has been lowered into opening position, and means on said lower section for carrying the upper section along.

4. In a gate for locks, weirs, and the like, the combination of upper and lower gate sections capable of independent movement one relatively to the other, means on the lower section to engage and support the upper section, and actuating mechanism which when operated in one direction will first move the upper section alone to its open position and will then move both sections in the opposite direction, to fully open the gate.

5. In a gate for looks, weirs, and the like, the combination of upper and lower gate sections of which the upper section is capable of a limited movement relatively to the lower section, and operating mechanism having individual connections to the respective sections, said mechanism, when operated continuously in one direction, effecting first a movement of the upper section in one direction and then a movement of both sections in the opposite direction. r

In testimonywhereof, Ihave signed this specification in the presence of two subscribing witnesses.

CARLO BONZANIGO.

Witnesses:

ARNOLD ZUBER. PHILIP HOLLAND. 7

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. G. v 

